Question

Sale of English and Hindi books in the years $1995,1996,1997$ and $1998$ are given below:
$\begin{array}{ccccc}\text{Years}& 1995& 1996& 1997& 1998\\ \text{English}& 350& 400& 450& 620\\ \text{Hindi}& 500& 525& 600& 650\end{array}$

Draw a double bar graph and answer the following questions:

(a) In which year was the difference in the sale of the two language books least?

(b) Can you say that the demand for English books increased? Justify.

Answer 1

$\begin{array}{ccccc}\text{Years}& 1995& 1996& 1997& 1998\\ \text{English}& 350& 400& 450& 620\\ \text{Hindi}& 500& 525& 600& 650\end{array}$

We can draw the double bar graph by taking the Years on $x$ axis and the corresponding values of English and Hindi on $y$ axis. The scale on the $y$ axis can be chosen as $100$ units of books sold.

Double bar graph:



(a) In the year $1998$, the difference in the sale of the two language books was least.

(b) Yes, the demand for English books increased. From the graph, it is evident that the difference in the demand for English books from $1995$ to $1998$ is $620-350=270$.

Whereas for Hindi books the difference is $650-500=150$.

Comparatively, the demand for English books increased.